linux-imx

/*

 * Copyright (C) 2015 Toradex AG.

 *

 * Author: Sanchayan Maity <sanchayan.maity@toradex.com>

 *

 * Based on the barebox ocotp driver,

 * Copyright (c) 2010 Baruch Siach <baruch@tkos.co.il>

 *  Orex Computed Radiography

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and

 * only version 2 as published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 */

​

#include <linux/clk.h>

#include <linux/delay.h>

#include <linux/device.h>

#include <linux/io.h>

#include <linux/module.h>

#include <linux/nvmem-provider.h>

#include <linux/of.h>

#include <linux/platform_device.h>

#include <linux/slab.h>

​

/* OCOTP Register Offsets */

#define OCOTP_CTRL_REG              0x00

#define OCOTP_CTRL_SET              0x04

#define OCOTP_CTRL_CLR              0x08

#define OCOTP_TIMING                0x10

#define OCOTP_DATA              0x20

#define OCOTP_READ_CTRL_REG         0x30

#define OCOTP_READ_FUSE_DATA            0x40

​

/* OCOTP Register bits and masks */

#define OCOTP_CTRL_WR_UNLOCK            16

#define OCOTP_CTRL_WR_UNLOCK_KEY        0x3E77

#define OCOTP_CTRL_WR_UNLOCK_MASK       GENMASK(31, 16)

#define OCOTP_CTRL_ADDR             0

#define OCOTP_CTRL_ADDR_MASK            GENMASK(6, 0)

#define OCOTP_CTRL_RELOAD_SHADOWS       BIT(10)

#define OCOTP_CTRL_ERR              BIT(9)

#define OCOTP_CTRL_BUSY             BIT(8)

​

#define OCOTP_TIMING_STROBE_READ        16

#define OCOTP_TIMING_STROBE_READ_MASK       GENMASK(21, 16)

#define OCOTP_TIMING_RELAX          12

#define OCOTP_TIMING_RELAX_MASK         GENMASK(15, 12)

#define OCOTP_TIMING_STROBE_PROG        0

#define OCOTP_TIMING_STROBE_PROG_MASK       GENMASK(11, 0)

​

#define OCOTP_READ_CTRL_READ_FUSE       0x1

​

#define VF610_OCOTP_TIMEOUT         100000

​

#define BF(value, field)        (((value) << field) & field##_MASK)

​

#define DEF_RELAX               20

​